add trailing dot

howto/new-machine.md

@@ -147,7 +147,7 @@ All commands to be run as root unless otherwise noted.
       for a checksum. it is generated in the next step
 
     Note that those scripts are new and haven't been thoroughly
-    tested, see [ticket #32914](https://bugs.torproject.org/32914) for details
+    tested, see [ticket #32914](https://bugs.torproject.org/32914) for details.
 
  6. reboot the new machine to make sure *that* still works: